Menzies R T, Tratt D M
Appl Opt. 1994 Aug 20;33(24):5698-711. doi: 10.1364/AO.33.005698.
An airborne CO(2) coherent lidar has been developed and flown on over 30 flights of the NASA DC-8 research aircraft to obtain aerosol and cloud backscatter and extinction data at a wavelength near 9µm. Designed to operate in either zenith- or nadir-directed modes, the lidar can be used to measure vertical profiles of backscatter throughout the vertical extent of the troposphere and the lower stratosphere. Backscatter measurements in absolute units are obtained through a hard-target calibration methodology. The use of coherent detection results in high sensitivity and narrow field of view, the latter property greatly reducing multiple-scattering effects. Aerosol backscatter profile intercomparisons with other airborne and ground-based CO(2) lidars were conducted during instrument checkout flights over the NASA Ames Research Center before extended depolyment over the Pacific Ocean. Selected results from data taken during the flights over the Pacific Ocean are presented, emphasizing intercom arisons with backscatter profile data obtained at 1.06 µm with a NASA Goddard Space Flight Center Nd:YAG lidar on the same flights.
一种机载二氧化碳相干激光雷达已被研制出来，并搭载在美国国家航空航天局（NASA）DC - 8研究飞机上进行了30多次飞行，以获取波长接近9微米处的气溶胶和云的后向散射及消光数据。该激光雷达设计为可在天顶或 nadir 定向模式下运行，可用于测量对流层和低平流层整个垂直范围内的后向散射垂直剖面。通过硬目标校准方法可获得绝对单位的后向散射测量值。相干检测的使用导致高灵敏度和窄视场，后一特性大大降低了多次散射效应。在仪器在NASA艾姆斯研究中心上空进行检查飞行期间，将气溶胶后向散射剖面与其他机载和地面二氧化碳激光雷达进行了比对，之后才在太平洋上空进行长时间部署。给出了在太平洋上空飞行期间获取的数据的选定结果，重点是与在同一飞行中使用NASA戈达德太空飞行中心的Nd:YAG激光雷达在1.06微米处获得的后向散射剖面数据进行的比对。
